Integrated: 8378298: Remove obsolete CDS string tests

[Ioi Lam]

On Fri, 20 Feb 2026 02:21:21 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> There are some very basic String test cases that came from early CDS development. They don't serve any purposes anymore as the functionalities are already covered by other test cases.
> 
> The methods of `WhiteBox.{areSharedStringsMapped, isSharedInternedString}` do not work for `AOTStreamedHeapLoader`, whose design doesn't distinguish between strings that came from the CDS archive or the app. The test cases that use these methods don't seem to be worth keeping.
> 
> `DumpSymbolAndStringTable` should be simplified to only test for `VM.stringtable` and `VM.symboltable`. The boiler-plate tests for `VM.systemdictionary` should be removed as we already have a more elaborate test: `serviceability/dcmd/vm/DictionaryStatsTest.java`.

This pull request has now been integrated.

Changeset: 103a0837
Author:    Ioi Lam <iklam at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/103a08378d423ce7345159a010fc79ed7ca8fbeb
Stats:     843 lines in 17 files changed: 2 ins; 831 del; 10 mod

8378298: Remove obsolete CDS string tests

Reviewed-by: matsaave, kvn

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PR: https://git.openjdk.org/jdk/pull/29834